Analysis: Illinois Does Not Need the Dynegy-Vistra Fleet

The analysis relies on a model also utilized by the Midcontinent Independent System Operator (MISO)—the grid operator for the Midwest region—in a number of studies. The aim of the analysis is twofold. First and foremost, it aims to evaluate whether the Dynegy-Vistra plants are necessary to the reliable supply of electricity in Central and Southern Illinois. Second, it further evaluates the impact of the Dynegy-Vistra plant retirements on electricity bills in Illinois by varying the capital and operating cost assumptions for the coal plants in the two main scenarios analyzed. Here’s a summary of the top findings of the report: